The air formaldehyde self test box test color is still transparent, whether it means that the formal

You have to compare the color card to know this.

Formaldehyde self-test box is the easiest way to detect, but the detection may be affected by temperature, humidity and space size, in order to accurately detect the indoor formaldehyde content, it is recommended to prepare more test boxes to calculate the average value. After introducing how to measure indoor formaldehyde concentration, let's bring you some efficient methods for removing aldehyde.

1. Wise Stone.

It can actively adsorb indoor free formaldehyde, the process will not be affected by any external factors such as temperature, humidity, light, etc., the adsorption rate of formaldehyde is also dozens of times that of ordinary adsorption materials, in addition to the unique decomposition function, the adsorbed formaldehyde can be decomposed into harmless carbon dioxide and water, and then discharged, so that its internal pores have been in an unsaturated state, and the aldehyde removal rate can reach more than 90%. When choosing, it is important to note that it is a gray ore with an irregular shape and is not a round particle.

2. Open windows for ventilation.

Open window ventilation is a very simple method to remove aldehyde, the purification principle is indoor and outdoor air circulation replacement, can release free formaldehyde and other harmful gases in the indoor air to the outdoors, reduce the indoor formaldehyde concentration. The efficiency of its aldehyde removal is directly related to the size of the outdoor wind, and the greater the outdoor wind, the higher the purification efficiency.

3. Activated charcoal.

Activated carbon has a large number of irregular pores, in which the pores similar to formaldehyde molecules will adsorb formaldehyde, which can achieve the purpose of purifying the air, but the number of internal pores is limited, when the adsorption is saturated, it may cause secondary pollution, and it must be replaced regularly when used

Fourth, the fresh air system.

The principle of the fresh air system is ventilation, the outdoor fresh air is filtered and transported to the room, and then the harmful substances containing formaldehyde are discharged outside to achieve the effect of removing formaldehyde.

5. Photocatalysts.

At present, most of the photocatalysts that are often mentioned are titanium dioxide, which can decompose formaldehyde into carbon dioxide and water through ultraviolet irradiation, but it needs to be involved in light and ultraviolet rays when working, and there are certain restrictions in removing formaldehyde.

In general, no method is absolutely perfect, and the effect will only be better if multiple methods are used together.

The formaldehyde self-test box is quite accurate, using chemical methods, the following will tell you a little about the principle of testing formaldehyde, formaldehyde in the air reacts with phenol reagent to form azine, which is oxidized into blue-green compounds by ** iron ions in an acidic solution, according to the color shade, colorimetric quantitative. This is very accurate, if you want to choose a test box, it is recommended 1It is necessary to choose a detailed manual, with both principles and instructions.

2.It is necessary to choose a pure water concentration of 3To be mechanically filled.

4.Be sure to buy a glass bottle, and the Qingyi test box is very good.

The color of the formaldehyde test usually shows non-formaldehyde changes according to different formaldehyde content levels. Generally speaking, at low concentrations, the color of formaldehyde test will be shown as light yellow or colorless transparent liquid, and the depth will gradually deepen with the increase of formaldehyde content, and when the formaldehyde content reaches a certain level, the color may become dark orange or red.

At the same time, it should be noted that in different formaldehyde detection methods, the corresponding test colors may also be slightly different. For example, if a formaldehyde test strip is used for the test, the test color may appear blue, dark blue, or purple, and the depth of the color will still vary with the increase of formaldehyde content.

In addition, it is important to note that when performing formaldehyde testing, the test color is not the only criterion. Because the depth of color may be affected by environmental factors, such as light, temperature, etc., it is also necessary to combine with other formaldehyde detection methods to judge.

In general, the color of formaldehyde test is generally light yellow or colorless transparent liquid, and the shade is positively correlated with formaldehyde content. However, when performing formaldehyde testing, the test color is not the only criterion for judging the formaldehyde content, and needs to be used in conjunction with other detection methods. <>

The formaldehyde test box is light green, which means that the test results show that the indoor formaldehyde concentration is within a certain limit. Formaldehyde is a harmful gas, which can come from various household building materials, cosmetics and household appliances, and pose a threat to human health. Therefore, it is very important to know the indoor formaldehyde concentration for our health.

Further expanding and extending the point or answer is that the test results of the formaldehyde test box are not necessarily completely accurate. When testing measurements, both environmental conditions and the accuracy of the test equipment can affect the test results. And when it comes to chain combustion, formaldehyde emissions may also increase or decrease after testing.

Therefore, the formaldehyde test box is only a preliminary test method and does not fully represent the indoor formaldehyde concentration.

In order to have a more accurate understanding of indoor formaldehyde concentration, how to improve the accuracy of the test? Before the test, ventilation should be done well. Because formaldehyde is one of the main indoor pollution, we can properly open windows for ventilation or use air purifiers.

In addition, the rate of volatilization of formaldehyde changes with temperature and humidity, so the indoor temperature and humidity should also be paid attention to when testing.

In short, the formaldehyde test box is light green, indicating that the formaldehyde concentration is within a certain limit, but the test results of the test box are not necessarily completely accurate, and it is necessary to pay attention to the environmental conditions and the accuracy of the test equipment. In order to have a more accurate understanding of the indoor formaldehyde concentration, it should be ventilated and cleaned in advance, and the indoor temperature and humidity should also be paid attention to during the test. <>

This color is beyond the standard, and it has turned blue, which is basically an over-standard state.

Formaldehyde is a common indoor harmful gas, and long-term exposure to low concentrations of formaldehyde can cause symptoms such as eye stinging, headache, nausea, vomiting, cough, redness and swelling. Therefore, the indoor formaldehyde concentration must be controlled within a safe range.

Generally speaking, the color of the formaldehyde detection box is divided into two types: light green is no problem, and a little darker may be an exceedance.

It should be noted that the formaldehyde detection box is only a preliminary detection method, which can only detect the formaldehyde concentration in the air, but cannot detect other harmful gases. Therefore, if there is a problem with indoor air quality, measures should be taken in time, such as ventilation, use of air purifiers, etc. At the same time, in order to ensure the safety of indoor air quality, it is recommended to conduct regular indoor air testing to ensure that the indoor air quality meets the national standards.

In addition, it should be noted that the test results of the formaldehyde detection box will be affected by some factors, such as air humidity, temperature, ventilation, etc. Therefore, when carrying out formaldehyde testing, it should be operated in strict accordance with the requirements of the instructions to ensure the accuracy of the test results.

Formaldehyde detection is to collect the formaldehyde in the quantitative gas, and then test, by measuring the formaldehyde in the air, and then calculate how much formaldehyde is in 1m of air, that is, the formaldehyde concentration unit mg m

This self-test box does not collect a certain amount of gas, and it is not known how much formaldehyde is collected in the gas, so it is impossible to get how much formaldehyde is in 1m of air.

1. First of all, it is necessary to see whether the testing institution is formal. Dozens of yuan and hundreds of yuan of handheld formaldehyde detector and formaldehyde test paper, the detection conditions are not established in many aspects, so the test results are not reference at all, in addition, the detection of formaldehyde treatment is generally unprofessional, and it is unfair. It is best to find a third-party laboratory for testing, which is more professional and fair.

2. Secondly, the test items and values. If you have babies and pregnant women, it is recommended to test for formaldehyde and benzene, the indoor air standard is GB T18883, and the doors and windows should be closed for about 12 hours before sampling. Formaldehyde standard value is, for pregnant women and babies, the absolute value of formaldehyde safety is the following, but this value, it is difficult to reach the general new house, maybe when the temperature is low in winter, formaldehyde volatilization can not come out, this time detection, formaldehyde is generally very low will not exceed the standard.

In addition, the requirements for benzene series are as low as possible, preferably undetected (below the minimum detected value).

The current formaldehyde test is generally divided into chemical method and physical calculation method.

1.The chemical method is generally to use formaldehyde in the air to react with phenol reagents to generate azine, which is oxidized into blue-green compounds by ** iron ions in an acidic solution, and is quantified according to the color shade and colorimetry. Pick a test box and generally look at these three points:

1.It is better to add an anti-jamming agent. 2.

Be sure to buy the glass bottles. 3.Mechanical filling.

Qingyi test box.

2.The physical calculation method is generally a multi-purpose test tester now, but the sensor in the tester is very demanding, and now the general cheap ** is not credible, it is recommended to buy some ** relatively high testers.